Title IIA funds can be used by districts to reduce class sizes. According to
a research summary in the area of class size reduction by the Northwest
Comprehensive Center, this strategy is most effective when:

It is used as a long-term strategy in the primary grades.

It is offered to minority and low-income students. Their gains increase
the longer they are exposed to smaller classes.

The class size is reduced to fewer than 15 students.

When used in alignment with these best practices, academic gains are found in
multiple academic subjects and for both genders. The gains are retained when
students return to larger classes in the upper grades.

Evidence of academic improvement from smaller classes in middle school and high school has been inconclusive.